Controller for electric motors.



R. E. BAERLOCKER, CONTROLLER FOR ELECTRIC MOTORS.

APPLIOATION FILED DEO. 24, 1909.

I m1. Nw@ Mm. Y 91 E ,E E INE V B W 6W INIQf. O am. I A

EV Wm s n 4m. P.

wITNEssEs: d(

R. F. BAERLOGKER. CONTROLLER FOR ELECTRIC MOTORS. APPLICATION FILED DEO. 24, 1909.

969,509. Patented sep1;.6,1910.

3 SHEETS-SHEET 2.

WITNESSES: INVENTOR Y A/// MM @do g ATTRNEY R. F. BAERLOCKER. CQNTROLLBR'FOR ELECTRIC MOTORS.

PPLIUATION FILED DEO. 24, 1909. 969,509,` y Patent-,ed septh 6,1910.

3 SHEETS-SHEET 3.

WITNESSES: INVENTOR 160 @6MM-f Y S g QW@ 0% J' ATTORNEY 'HE-STv rtsi. mmf 'UNTED STATES PATENT OltlFlCE.

ROBRT FEJBERCH 'JSAER-LOCKER, 0F MANCHESTER, ENGLANDA'SSIGNOR TO WEST-- INGHUUSE ELEGTRC AND MAIIUFACTUBNG COMPANY, .A CORPORATION GF PENN CNTROLLER FOR ELECTRHJ MOTORS.

Specification of Letters Patent.

.ppncatiou fiedlecember 24, 1909. Serial No. 534,'255

:u Y 4 mut View 0l t cmxtrullcr with the lill @t the cmlug chmod, the @ml part, 01" the latter bring jr. sectlon ti discltm-r the actuating mculnmsm. Fig. E2 is n side elemton of the Controller shown in Fig'. broken awry and shown partly in section. :1 n @nl View of the controller 'with the can A shown in mation tu disclose thtJ rkhr l im ris.

Referring to the tt'fwhlgs, l is the c011- trollor uur 'which constitutes an Oil tant.'7 :uivfl 2 is a drum mounts/l therein, so that its l, with the end portions of the casing axis i9 'llorizontnt The drum i). may' be r0- tzltcxl by means oit :1, hamlwvheel 3 upon a vertical @hatt l through beveled gearing; 5 mtl G. tlm Shaft 1; heling jouru'allef'l at its upper 0nd in :l hearing l in the lcl S oit th@ controller casing. und at its lower end in a Step hearing currccl by the bracket 9 which iS Secured to th@y lid 8, as is best shown in 2 :mtl 3. ln the bracket 9 also m:- ruuggeal :l Waring for m10 and 1Q of thc- @my trullr {ti-um.. thtl @ther @11d 1l ot the lutter f lnuhrg a. hearing in f1 :bracket l2 which is also Sumjortotl 4from the` lid 8 to'whlch it is favoured hy nuts K3, lily-1s shown in Figs. l. :1 ncl 11 m'tlrer to @Qnuect the Supply und work circuits tn thel controller, l provide a series wt txed. terminal l5, gjlrctoruhly iu :1 sep rata mmpmtmont. lt) of the casing'. AS shown in lfg. 3, the compartment 16 iS forllmtl-hy tlmlgts l?. 1S ot the Casing, zur oulur 'mall '113. :tml m1 insulating; covering 2O.` Ihre insulating cover 20 .nud extend over the. lino 'lmulsz only. since the mmm* lends nr@ domi wlwn tho @over is onthuld.

nmterzzl, is screwed at one und to pw jectng part 2T on the bracket il, and al the other (rml t0 ai progr-mung' arm 28 on the bracket l2 (llgj. il). The swltch arms Q5 are constructed ot a good conducting metal. being suitably formed by Casting' or other-- Wise, and @ach is; provided with a rrfrms; Q9 which 's ,adapted t0 tit over lh@ huir to which tis rigidly secureal l Y le, mnh i. l, the

Switch arms being insular he "um preferably by mica, as 5l upper and of each arm 2L if mln Ceve a lamrated copper hrt) lz ClanrLetl thereto 4by Screws 1 arm being so dimensioned that when the lid by means of thumb-screws 52; but it is evi-y 8 is in closed position the brush 3l extends through an opening 34 in the insulating covering 20 of the separate compartment 16, and presses firmly upon the exposed upper surface of a fixed terminal l5. At the lower end of each arm 25, a spring iinger 24 of copper or other good conducting material is located, it being secured in electrical connection therewith by any suitable means, as, for instance, by a clamp 35, as shown in Fig. 3, and the contact piece 36 .of eacliinger Ais given a certain amount of play for engaging the contact strips 37 on the controller drum 2, the amount of play being adjustable' by means of a screwed projection 38 extending from the back of the contact piece 36l through a hole in a part of the clamp 35 and carrying an adjusting nut 39.

By the arrangement described and with the lid 8 closed, as shown by full lines in Fig. 3, it will be seen tha. the controller fingers 24 are in electrical connection with the supply and work circuits through the switch arms 25, laminated copper brushes 31, and fixed terminals 15. The controller iingers 24, drum 2, and actuating gearing 5, 6, are normally immersed in oil.in the casing 1, the oil level being indicated .by dotted line 40`in Fig. 3. At the back of the casing two projections 41 are formed, one near cach end, each being provided with a hole 42,*t-o receive a pivot pin 43, upon which the ring headed bolt 44 is adapted to hinge (Figs. l and 3), and similar projections 45, pivot pins 4G, and ring-headed bolts 47 are provided on the front side of the casing. j

' On the rear side of the lid 8, two lugs 48 are provided toiit, respectively, over the shank of a ring-headed bolt 44 upon which the lug is adjusted and clamped by means of bolts 49, 50, so as to make a tight joint with the edge of the casing when the lid is closed. On the front side of the lid, split projections 51 are provided to receive tliering-he'aded bolts 47, the lid being pressed firmly down dent that thelid may be secured to the casing by any other means which will normally make a tight joint between these two parts.

Vhen it is desired to inspect or repair any part of the controller normally immersed in oil, it is only necessary to slacken the thumbscrews 52 and raise the lid by the handle into the open position, in which position it may be conveniently held bythe pivoted strut 56 which engages a notch 57 in the lid. 'l`he controller fingers 24 arc thus disconnected from the outer circuits by reason of the separation of the copper brushes 31 from the fixed terminals l5 and, at the Same-time, the operative parts are raised from the oil and exposed to view and can be handled Without disconnecting any of the circuit wires from the iiXed terminals For high tension circuits, it is advisable to separa-te the primary from the Secondary terminals by means of a partition in the controller casing, such a partition being shown in dotted lines in Fig. 1 and designated by the numeral 54.

I claim as my invention:

1. The combination with an oil-containing tank provided With'external circuit contact terminals, of a lremovable cover for said tank and an electric controller mounted upon said cover and having contact devices which engage the tank contact terminals when the cover is in its normal position on t-he tank.

2. The combination with an oil-containing tank having contact terminals at one side thereof of a cover hinged to said tank, anda controllervsupported by said cover and provided with contact terminals which engage the tank contact terminals when theV cover is in its normal closed position. 3. The combination with a tank having a plurality of contact terminals, of a remova'ble cover for said tank and a controller suspended from said cover with its axis par-` allel thereto and having circuit making and breaking devices to engage the tank contact terminals when the cover is in normal position.

4. The combination with a tank having a main compartment and a supplemental com-v partment and provided with contact terminals in the supplemental compartment, of a removable cover, and av controller suspended from said cover and having circuit making and breaking devices to engage the tank contact terminals when in normal position.

5. The combination with a receptacle comprising a body portion and a removable cover, of a controller suspended from the cover anda circuit making and breaking switch, the respective members of which are supported by the 4body portion and by the cover. l

In testimony whereof, I have hereunto llt subscribed my name .this 9th day of December,l 1909.

ROBERT FRIEDERICH BAERLOGKER.

Witnesses:

JAS. STEWART BRoADroo'r, H. R. KrrsoN. 

